<template>
    <div class="about">
        <h1>{{id ? `编辑`:`新建`}}分类</h1>
        <el-form label-width="120px" @submit.native.prevent="save">
            <el-form-item label="上级分类">
                <el-select v-model="model.parent">
                    <el-option v-for="item in parents" :key="item._id" :label="item.name" :value="item._id"></el-option>
                </el-select>
             </el-form-item>
            <el-form-item label="名称">
                <el-input v-model="model.name"></el-input>
             </el-form-item>
             <el-form-item>
                <el-button type="primary" native-type="submit">保存</el-button>

            </el-form-item>

        </el-form>
    </div>
</template>

<script>
export default {
    props:{
        id:{}

    },
    data(){
        return{
            model:{},
            parents:[]
        }
    },
    methods:{
       async save(){
           let res
           if (this.id) {
                res = await this.$http.put(`rest/categories/`+this.id,this.model)
           } else {
                res = await this.$http.post('rest/categories',this.model)
           }
         
          this.$router.push('/categories/list')
          this.$message({
              type:'success',
              message:'保存成功'
          })
        },
        async fetch(){
            const res =await this.$http.get(`rest/categories/`+this.id)
            this.model=res.data
        },
        async fetchParents(){
            const res =await this.$http.get(`rest/categories/`)
            this.parents=res.data
        }
    },
    created(){
        this.fetchParents()
        this.id && this.fetch()
    }
}
</script>